Concentration?
2020-08-02 1:32 pm
Assume the you have a compound Y that has a molar absorptivity of 3420 M^-1 cm^-1 . If the absorbance of a solution of this substance is 0.350, what is its concentration? Assume the substance is measured in a spectrophotometer cuvette having a path length of 1.00 cm .
回答 (2)
2020-08-02 1:39 pm
Absorbance, A = 0.350
Molar absorptivity, ∊ = 3420 M⁻¹ cm⁻¹
Length of the light path, ℓ = 1 cm
A = ∊ ℓ c
Then, c = A / (∊ ℓ)
Concentration c = 0.350 / (3420 × 1) M = 1.02 × 10⁻⁴ M
Molar absorptivity, ∊ = 3420 M⁻¹ cm⁻¹
Length of the light path, ℓ = 1 cm
A = ∊ ℓ c
Then, c = A / (∊ ℓ)
Concentration c = 0.350 / (3420 × 1) M = 1.02 × 10⁻⁴ M
2020-08-02 1:44 pm
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I spend a lot of time on each problem, I just want to make sure it's for a worthwhile cause.
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